Harry c



(No'Model.)

H. c. BURDICK.

PAPER BAG MAGHINE.v

Patented July 30, 1889.

A N. PETER; Phuwumogmpner, wnsmngum. o. c.

UNITED STATES PATENT OFFICE.

HARRY C. BURDICK, OF NEXV YORK, N. Y.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent No. 407,813, dated July 30, 1889.

Application filed October 19, 1888. Serial No. 288,608. (No model.)y

To @ZZ 1071/0711, it may concern:

Be it known that I, HARRY C. BURDICK, of the city, county, and State of New York, have invented an Improvement in Paper-Bag Machines, of which the following' is a specification.

My invention relates to paper-bag machines; and it consists of certain improvements,which are fully set forth in the following specification, and shown in the accompanying drawings, which form part thereof.

More specifically my invention relates to mechanism for folding so-called Satchel-bottom bags into their final shape, giving them the appearance of the square-bottom bag with bellows-folds; and it is immaterial to my invention What mechanism is employed to `form the Satchel-bottom bag before it is delivered to the bellows-fold-forming mechanism. My mechanism is preferably used in connection with an ordinary satchel-bottom-bag machine,

forming an entirety and preferably operating in unison with it. The bag after its bottom has been formed is delivered to my bellowsfold-forming mechanism, Where its sides are folded in the desired manner. For this purpose I use a traveling apron upon which the bags are carried past two suction-boxes, by which they are opened up to allow the bellows-folds in the sides to be formed. Thence the bags are conducted 'between iatteningfolders and emerge from the machine ready for packing.

The mechanism by which I carry out my invention is shown in the drawings, in whichl Figure 1 is a plan view of a paper-bag machine With my improvements combined there- With. Fig. 2 is a sectional view t-hrough the line of Fig. l. Fig. 3 is a perspective view of one of the suction-boxes removed from the apparatus. Fig. 4 is a sectionalv view through the line y y of Fig. l. Figs. 5, 6, 7, 8, 9, l0, and l1 are perspective views of the bag, illustrating thel successive steps in the formation and folding of it.

A may be any suitable machine for making paper-bags having Satchel-bottoms; but I prefer to use the Purvis machine provided With the suction diamond-fold former B, the pasting-wheel C, the bottom-folder D, and pressure-wheels E. The bag made from the paper tube, Fig. 5, after going through the machine A, is in the form shown in Fig. 6, which is then to be folded into the shape illustrated in Fig. 1l.

Gr is a brush Wheel or roller, journaled in the frame of the machine, provided With a pulley g and a belt-connection with a rotating shaft R, whereby it is rotated and draws the bag from the aprons of the machine A into position to be fed to the folding mechanism.

F is a guide-stop on the frame of the machine to bring the bag in proper position and alignment.

II is the guide-table upon which the bag rests upon emerging from between the aprons of the machine A.

I is a feeding-roller carried upon a shaft t',

which is secured to a lever J. This lever is fulcrumed on the shaft frLof one of the guiderollers N, and,through the action of spring j, presses upon a cam K, carried upon a shaft n', so that the rotation of this cam K upon its shaft Will cause the lever, and in consequence the feeding-roller I, to rise and fall intermittently to feed the bags to the bands M. The shafts n and n are provided with gearwheels L and L', respectively, which mesh with each other. n is a pulley u, having a band connection 'u' With another pulleyU on the end of the shaft o', to rotate the feeding-roller I continuously.

N are four guide-rollers, about which two endless aprons M of open-work pass. The shaft of one of these rollers N is geared with the rotating shaft R, and from which motion is given to the various parts of the machine through the rotation of the other guide-rollers N by the aprons M and gearing L.

O are suction -boXes having, preferably, slightly-curved faces provided with orifices or holes o. These suction-boxes are located Within the aprons M, and are opposite each other. By means of tubes P and a fan or vacuum pump Q, the desired suction is created. It will be seen that the same fan or vacuum-creating device Q may also be connected with the suction-former B of the machine A.

The apertures o of the suction-boxes O are preferably more numerous and extend to a greater extent laterally at the front end than at the rear, as indicated in Fig. 3, as this Will Upon the end of the shaft IOO open the bag fully at the start and then permit the sides corresponding to the bellowsfolds to be pushed in and remain in.

It is desirable to first crease the tube from which the bag is to be formed so that it will bend easily on the folds corresponding to the bellows-folds. These creases are indicated in dotted lines in Figs. '5, 6, and 7.

T are two small endless aprons, located close to the ends of the aprons M, running over four guide-rollers S, two of which are geared together, as at s, to insure uniform speed and travel, and the shaft of one of which rollers has a vpulley-and-band connection 'with the shaft of the operative guide-rollers N, by which motion is given to the aprons. I prefer that th ese rollers S should be arranged so that the aprons will incline toward each other, as shown in Fig. 2, to iiatten the bag.

W are fingers or arms-preferably springsconstructed of wire located on the frame of the machine on each side of the aprons M, and

projecting slightly between them for the pur-v pose of making the bellows-folds in the sides j the spirit of it.

The operation of the machine is as follows The bags having the Satchel-bottom formed as shown in Fig. G are taken from between the aprons of the machine A by the rollerbrush G upon the table H. When, through the operation of the cam K, the feeding-roller I is dropped upon the bag, a forward movement is immediately imparted to it by the Vrotation of the roller, and the bag is carried between the aprons M. The Satchel-bottom passing under the roller I and between the bands M and rollers N will be flattened, as shown in Fig. 7. The bag is now carried between the suction-boxes O, which draw toward them the aprons M, and with them the bag, opening it into the shape shown in Fig. 8. As this bag is carried by the aprons its sides come in contact with the lateral spring-arms WV, which folds in its sides, as shown in Fig.

l 9, and passing thence between the iiatteningaprons T it is flattened successively into the shapes shown in Figs. l0 and ll, leaving the machine as a bellows-folded Satchel-bottomed bag.

It will be observed that the treatment of A the tube from the Vtime it enters the bottomforming machine to the time it emerges from' the bellows-folding machine is continuous,

and that the bellows-folds are formed after,

the bottom is formed, which method is novel, as far as I am aware.

In this application I do not claim the process of manufacturing paper bags in the manner described, as that forms subject-matter of another application of mine, led on the 19th.

day of October, 1888, and serially numbered 2. The combination of a satchelbottompaper-bag machine, a bellows-side-folding machine having its feeding end arranged adjacent to the delivery end of the Satchelbottom-bag machine, and consisting of bagconveying devices, suction devices for drawing the faces of the bag apart, and folding devices. for pressing the sideiedges of the bag, feeding-rollers interposed between the delivery end of the satchel-bottom-bag machine and feeding end of the bellows-side-` folding machine, and power mechanism to make all of the machines and feeding-rollers operate in unison.

3. The combination, with a Satchel-bottompaper-bag machine having a longitudinal bagconveying device, with a traveling bag-conveying device, of a bellows-side-folding machine arranged at right anglesto the delivery end of the conveying device of the Satchelbottom-bag machine, and mechanism for deliverin g the finished Satchel-bottom bag to the conveying device of the bellows-side-folding machine.

4t. In a machine for forming bellows-folds on a bag, the combination of two suctionboxes arranged. opposite to each other and having their opposing faces provided with apertures, a suction-fan or dexhauster for said suction-boxes, means to convey a vbag .between said suction-boxes, whereby it is opened, and fingers or arms to press in the sides of the bag between the suction-boxes Vduring the travel of the bag.

5. The combination of two endless aprons of open-work brought together at one end,V two suction-boxes arranged, respectively,`

back of the aprons and with their opposing faces perforated to suck air through the aprons to open the bag-tube conveyed by said aprons, a suction-fan or eXhauster to draw air through said suction-boxes, and stationary fingers or arms arranged between the lateral edges of the suction-boxes toact uponthe bag-tube to press in its sides when the tube is opened and being conveyed between the suction-boxes.

IIO

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6. The combination of the rollers Nand two endless open-work bands M with the suctionboxes O, having perforated faces, and fingers or arms NV on each side and between the boxes.

7. The combination of the rollers N and two endless open-work bands M with'the suctionboxes O, having perforated faces, fingers or arms W on each side and between the boxes, table H, feed-roll I, and mechanism for intermittently actuating said feed-roll to feed the tubes between the aprons.

8. The combination of the rollers N and two endless open-work bands M with the suctionboxes O, having perforated'faces, fingers or arms WV on each side and between the boxes, and rollers S and bands T for flattening the tubes after the bellows-folds are formed.

9. A suction-box for a paper-bag machine,

having its face formed with a series of perforations covering an area decreasing in width as we move from one end to the other of said face.

l0. A suction-box for a paper-bag machine,

having its face formed at in a transverse di# rection and with a slight curvature in the direction of its length, and with a series of perforations covering an area decreasing in width as we move from one end to the other of said face.

In testimony of which invention I hereunto 3o .set my hand.

HARRY C. BURDICK. Vitnesses:

R. W. HULL,

EDWD. MARSHALL GROUT. 

